162 lines
4.7 KiB
C++
162 lines
4.7 KiB
C++
/*************************************************************************/
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/* cp_loader_it_patterns.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "cp_loader_it.h"
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CPLoader::Error CPLoader_IT::load_patterns() {
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for (int i = 0; i < header.patnum; i++) {
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if (i >= CPSong::MAX_PATTERNS)
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break;
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/* Position where pattern offsets are stored */
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file->seek(0xC0 + header.ordnum + header.insnum * 4 + header.smpnum * 4 + i * 4);
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uint32_t pattern_offset = file->get_dword();
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if (pattern_offset == 0) {
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continue;
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}
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uint16_t pat_size;
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uint16_t pat_length;
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int row = 0, flag, channel, j;
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uint8_t aux_byte;
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uint32_t reserved;
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uint8_t chan_mask[64]; //mask cache for each
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CPNote last_value[64]; //last value of each
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for (j = 0; j < 64; j++) {
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chan_mask[j] = 0;
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last_value[j].clear();
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}
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file->seek(pattern_offset);
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pat_size = file->get_word();
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pat_length = file->get_word();
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reserved = file->get_dword();
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song->get_pattern(i)->set_length(pat_length);
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do {
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aux_byte = file->get_byte();
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flag = aux_byte;
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if (flag == 0) {
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row++;
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} else {
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channel = (flag - 1) & 63;
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if (flag & 128) {
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aux_byte = file->get_byte();
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chan_mask[channel] = aux_byte;
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}
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CPNote note; //note used for reading
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if (chan_mask[channel] & 1) { // read note
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aux_byte = file->get_byte();
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if (aux_byte < 120)
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note.note = aux_byte;
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else if (aux_byte == 255)
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note.note = CPNote::OFF;
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else if (aux_byte == 254)
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note.note = CPNote::CUT;
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last_value[channel].note = note.note;
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}
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if (chan_mask[channel] & 2) {
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aux_byte = file->get_byte();
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if (aux_byte < 100)
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note.instrument = aux_byte - 1;
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last_value[channel].instrument = note.instrument;
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}
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if (chan_mask[channel] & 4) {
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aux_byte = file->get_byte();
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if (aux_byte < 213)
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note.volume = aux_byte;
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last_value[channel].volume = note.volume;
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}
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if (chan_mask[channel] & 8) {
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aux_byte = file->get_byte();
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if (aux_byte > 0)
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note.command = aux_byte - 1;
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last_value[channel].command = note.command;
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note.parameter = file->get_byte();
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last_value[channel].parameter = note.parameter;
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}
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if (chan_mask[channel] & 16) {
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note.note = last_value[channel].note;
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}
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if (chan_mask[channel] & 32) {
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note.instrument = last_value[channel].instrument;
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}
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if (chan_mask[channel] & 64) {
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note.volume = last_value[channel].volume;
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}
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if (chan_mask[channel] & 128) {
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note.command = last_value[channel].command;
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note.parameter = last_value[channel].parameter;
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}
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song->get_pattern(i)->set_note(channel, row, note);
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}
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} while (row < pat_length);
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}
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return FILE_OK;
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}
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